Abstract: A coil assembly. The coil assembly includes a circuit carrier, an electrical coil, the winding of which is wound around a magnetic core and engages through an inner opening, and a cooling arrangement, wherein at least two turns each have an electrically conductive conductor piece with two end pieces which are each inserted and brought into contact in an electrical via. On a surface of the circuit carrier facing the coil in the region of the magnetic core, the cooling arrangement has a plurality of first conductor structures which are thermally coupled using at least one thermal via to a plurality of associated second conductor structures on a surface of the circuit carrier facing away from the coil. The first conductor structures are disposed spaced apart from one another and are each connected to at least one of the electrical vias.

Abstract: A system and method for monitoring the remaining useable life, or “wellness,” of a contactor or motor starter, and for predicting impending faults of such a device, is disclosed. By monitoring actuating coil current, actuating coil voltage, line current, and/or line voltage, the present invention can calculate wellness metrics which, when compared to threshold values, may be used as indicators of remaining life and/or imminent failures. The invention also provides non-mechanical positive indications of proper closures and openings of contacts for safety interlocking.

Abstract: A system and method for monitoring the remaining useable life, or “wellness,” of a contactor or motor starter, and for predicting impending faults of such a device, is disclosed. By monitoring actuating coil current, actuating coil voltage, line current, and/or line voltage, the present invention can calculate wellness metrics which, when compared to threshold values, may be used as indicators of remaining life and/or imminent failures. The invention also provides non-mechanical positive indications of proper closures and openings of contacts for safety interlocking.

Abstract: The present invention provides an electrical isolation apparatus having independently controllable contactors. The isolation apparatus includes a contactor for each phase or pole of an electrical device as well as each phase or pole of a load. Each contactor is constructed so that each includes multiple contact assemblies that may be independently controlled to open and close. Moreover, the contactors within a single contactor assembly or housing can be independently controlled so that the contacts of one contactor can be opened without opening the contacts of the other contactors in the contactor assembly. Additionally, the contactors are construct and controlled such that a single line side contactor and a single load contactor open simultaneously when an open circuit condition is desired.